ExtJs Gridpanel selection modal -

i have 2 questions:

1. how set first row in extjs gridpanel selected and
2. how write separate js file custom validations phone nos , datefields , etc

thanks in advance

assuming have instance of grid, can select row using selectfirstrow(). here sample code:

grid.getselectionmodel().selectfirstrow(); 

you can move custom validations file. need move your

ext.apply(ext.form.vtypes, {     daterange : function(val, field) {         var date = field.parsedate(val);         ...     } }); 

to separate file. , ensure js file included.